greybus: camera: Fix size of configure_streams(0)

When APB-A CSI-Tx configuration fails, it is necessary to unconfigure
the camera module issuesing a 0 stream configuration request.
Fix size of request and response to avoid Greybus core complain about
Response size differences.

Testing Done: Triggering the error condition after APB-A CSI-tx
configuration does not make Greybus core complain anymore

Signed-off-by: Jacopo Mondi <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Alex Elder <[e-mail]>

drivers/staging/greybus/camera.c

···
 			memset(req, 0, sizeof(*req));
 			gb_operation_sync(gcam->connection,
 					  GB_CAMERA_TYPE_CONFIGURE_STREAMS,
-					  req, req_size, resp, resp_size);
+					  req, sizeof(*req),
+					  resp, sizeof(*resp));
 			*flags = 0;
 			*num_streams = 0;
 			goto done;